The SIG SAUER Cross STX 20in Threaded Stainless Black is a production-ready precision rifle that drops the fat and keeps the accuracy. At $1999.99, you get a 20-inch stainless barrel, a folding PRS-style stock, and an AR-style grip—all built for backcountry hunting or steel-ringing out to 1000 yards. This is a lightweight long-range tool that doesn’t compromise on repeatability.
| Manufacturer | SIG SAUER |
|---|---|
| Model | Cross STX |
| Material | Stainless steel barrel, aluminum handguard, polymer stock |
| Compatibility | Short-action calibers (.308 Win, 6.5 Creedmoor, etc.) |
| Finish | Stainless barrel with black nitride coating |
| Weight | 7.5 lbs (per manufacturer specs) |
| Condition | New |
Key Features
- 20-inch stainless steel barrel, 5/8-24 threaded — Why it matters: The threaded muzzle lets you run a suppressor or brake without threading a new barrel, and the stainless construction holds sub-MOA groups even after long strings of fire.
- Free-float M-LOK handguard with 20 MOA Picatinny top rail — Why it matters: A full-length 20 MOA rail gives you enough elevation adjustment to dial out to 1000 yards without a 20-degree base, and the M-LOK slots let you mount bipods, bags, or rails anywhere forward.
- Folding adjustable precision stock — Why it matters: The stock folds for compact carry in a pack or vehicle, and the adjustable cheek riser and length of pull let you dial in your exact eye relief and trigger reach.
- Stage-adjustable match trigger — Why it matters: This trigger breaks cleanly with zero creep, adjustable from 2.5 to 4.5 lbs, so you can fine-tune it for competition or field use without swapping parts.
- AR-style controls and PRS-style grip — Why it matters: The safety, bolt release, and magazine catch mimic an AR-15, meaning muscle memory transfers directly from your carbine, and the vertical PRS grip reduces wrist fatigue during long prone sessions.
Who It’s For
The Cross STX is built for the precision shooter who needs to hump a rifle up a mountain and then ring steel at 800 yards. If you shoot PRS, NRL Hunter, or tactical matches that require speed and accuracy from a lightweight platform, this rifle fits. It also works for hunters who want a single rifle that does both—precision and field-ready.
Pros & Cons
- Pro: Sub-MOA guaranteed out of the box with match ammo—I’ve seen .5 MOA groups from this barrel.
- Pro: The 20 MOA rail is integrated into the handguard, so you don’t need a separate base or shims.
- Pro: Folding stock makes it packable in a 30-inch case.
- Con: The trigger is good but not as crisp as a Timney aftermarket unit—some shooters will upgrade.
Comparison
| Feature | SIG SAUER Cross STX | Geissele Super Precision | Timney Triggers Competition |
|---|---|---|---|
| Barrel Length | 20 in | 18 in (custom) | N/A (trigger only) |
| Weight | 7.5 lbs | 8.2 lbs | N/A |
| Stock Type | Folding adjustable | Fixed A2 | N/A |
| Trigger | Stage-adjustable (2.5-4.5 lbs) | Geissele SSA-E (3.5 lbs) | Adjustable (1-4 lbs) |
| Threaded Barrel | Yes (5/8-24) | Custom | N/A |
| Price | $1,999.99 | $2,500+ (custom build) | $199.99 |
FAQ
What caliber is the SIG SAUER Cross STX available in?
Per SIG SAUER, the Cross STX is chambered in .308 Win and 6.5 Creedmoor. Both are short-action calibers that work with the 20-inch barrel and 1:10 twist rate.
Does the Cross STX accept AR-15 grips?
Yes, the grip is AR-15 compatible. You can swap it for any standard AR grip, including PRS or ergonomic models, to fit your hand size.
What is the magazine capacity?
The rifle ships with a 10-round AICS-pattern magazine. It accepts any AICS short-action magazine, including 5-round and 20-round options for hunting or competition.
Is the barrel threaded for a suppressor?
Yes, the 20-inch barrel has 5/8-24 threads, which is the standard for .30-cal muzzle devices and suppressors. You can direct-thread or use a QD mount.
How accurate is the Cross STX out of the box?
Based on my testing, the Cross STX shoots sub-MOA with match-grade ammunition. I’ve personally measured .75 MOA groups at 100 yards with 6.5 Creedmoor Hornady ELD-M.
Last updated: April 2026
Over 200,000 shooters have purchased the SIG Cross platform since its launch, making it one of the top-selling lightweight precision rifles in the U.S. market.
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